Sir Douglas Ralph Nicholls, KCVO, OBE was a prominent Aboriginal Australian from the Yorta Yorta people. He was a professional athlete, Churches of Christ pastor and church planter, ceremonial officer and a pioneering campaigner for reconciliation.
Nicholls was the first Aboriginal Australian to be knighted when he was appointed Knight Bachelor in 1972. He was also the first — and to date the only — Indigenous Australian to be appointed to vice-regal office, serving as Governor of South Australia from 1 December 1976 until his resignation on 30 April 1977 due to poor health.